Global Patent Index - EP 0506031 A1

EP 0506031 A1 19920930 - Illumination flicker correction for video cameras.

Title (en)

Illumination flicker correction for video cameras.

Title (de)

Korrektur des Beleuchtungsflimmerns für Videokameras.

Title (fr)

Correction du scintillement d'éclairage pour des caméras vidéo.

Publication

EP 0506031 A1 19920930 (EN)

Application

EP 92105163 A 19920325

Priority

JP 6285891 A 19910327

Abstract (en)

A flicker correcting circuit for reducing a large, rapid change in signal level generated in a case where a CCD television camera or the like is operated in the shutter mode, and for obtaining a flickerless, high-quality video signal for an object illuminated with a fluorescent lamp, is disclosed, in which the level of a video signal from a CCD (1) is detected at each field by a signal processor (4), and a microcomputer (5) controls a shutter pulse generating circuit (6) so that a shutter pulse for controlling the charge storage period of the CCD is delivered from the shutter pulse generating circuit to the CCD in accordance with the detected level at each field. <IMAGE>

IPC 1-7

H04N 5/217

IPC 8 full level

H04N 5/217 (2006.01); H04N 5/235 (2006.01); H04N 5/335 (2006.01); H04N 5/351 (2011.01); H04N 5/353 (2011.01); H04N 5/357 (2011.01); H04N 5/372 (2011.01); H04N 5/376 (2011.01); H04N 5/378 (2011.01)

CPC (source: EP)

H04N 23/70 (2023.01); H04N 23/745 (2023.01)

Citation (search report)

  • [Y] WO 9004303 A2 19900419 - ARNOLD & RICHTER KG [DE]
  • [Y] US 4879591 A 19891107 - TAKEI MASAHIRO [JP]
  • [A] US 4670787 A 19870602 - LEVINE PETER A [US]
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 13, no. 317 (E-789)19 July 1989 & JP-A-1 086 666 ( TOSHIBA CORP. ) 31 March 1989
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 6, no. 028 (E-095)19 February 1982 & JP-A-56 149 179 ( CANON INC. ) 18 November 1981
  • [A] PATENT ABSTRACTS OF JAPAN vol. 12, no. 101 (E-595)2 April 1988 & JP-A-62 232 278 ( OLYMPUS OPTICAL CO.LTD. ) 12 October 1987
  • [A] PATENT ABSTRACTS OF JAPAN vol. 14, no. 005 (E-869)9 January 1989 & JP-A-1 253 369 ( MATSUSHITA ELECTRIC IND.CORP.LTD. ) 9 October 1989

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0506031 A1 19920930; CA 2062600 A1 19920928; JP 2995887 B2 19991227; JP H04298167 A 19921021

DOCDB simple family (application)

EP 92105163 A 19920325; CA 2062600 A 19920310; JP 6285891 A 19910327